Crotalus pusillus

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	REPTILIA	SQUAMATA	VIPERIDAE

Scientific Name:	Crotalus pusillus
Species Authority:	Klauber, 1952

Assessment Information [top]

Red List Category & Criteria:	Endangered B1ab(iii) ver 3.1
Year Assessed:	2007
Assessor/s:	Ponce-Campos, P. & García Aguayo, A.
Reviewer/s:	Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Justification: Listed as Endangered because it is currently known from less than five locations, with a total extent of occurrence of less than 5,000 km², and there is an ongoing decline in the extent and quality of its habitat.

Geographic Range [top]

Range Description:	This species is endemic to Mexico. Disjunct locations are recognized; southwestern Michoacan in the Sierra de Coalcoman and in the northeast in eastern Volcanic Belt, and in the extreme western Volcanic Belt in southern Jalisco and adjacent Colima.
Countries:	Native: Mexico
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	No population information is available for this species. Currently no studies focusing on this snake are known to be underway.
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	It appears mostly to be restricted to pine-oak forest, usually in areas of volcanic rock and outcroppings.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	Habitat loss for agriculture and human settlement is the main threat, although it is not known how serious this is to the population.

Major Threat(s):

Habitat loss for agriculture and human settlement is the main threat, although it is not known how serious this is to the population.

Conservation Actions [top]

Conservation Actions:	It occurs within Colima Volcano protected area.

Conservation Actions:

It occurs within Colima Volcano protected area.

Bibliography [top]

	Armstrong, B.L. and Murphy, J.B. 1979. The natural history of Mexican rattlesnakes. University of Kansas Museum Natural History, Special Publications 1(5): 1-88. Campbell, J.A. and Lamar, W.W. 1989. The venomous reptiles of Latin America. Cornell University Press, Ithaca, New York. Campbell, J.A. and Lamar, W.W. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock, Ithaca, New York and London, UK. IUCN. 2007. 2007 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 12th September 2007). Klauber, L.M. 1972. Rattlesnakes: Their Habits, Life Histories, and Influence on Mankind. Second edition. University of California Press, Berkeley, California.

Armstrong, B.L. and Murphy, J.B. 1979. The natural history of Mexican rattlesnakes. University of Kansas Museum Natural History, Special Publications 1(5): 1-88.

Campbell, J.A. and Lamar, W.W. 1989. The venomous reptiles of Latin America. Cornell University Press, Ithaca, New York.

Campbell, J.A. and Lamar, W.W. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock, Ithaca, New York and London, UK.

IUCN. 2007. 2007 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 12th September 2007).

Klauber, L.M. 1972. Rattlesnakes: Their Habits, Life Histories, and Influence on Mankind. Second edition. University of California Press, Berkeley, California.

Citation:	Ponce-Campos, P. & García Aguayo, A. 2007. Crotalus pusillus. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 10 February 2012.
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